Berk PROTO-TYPE Composites

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GlasNago
Posts: 80
Joined: Thu Aug 11, 2016 6:47 pm

by GlasNago

no thanks for prompt response, copacetic.
currently installed a gelu saddle and mcfk pin so at 125g the mass reduction wouldnt be much but depends how close i get to 4kg when some parts arrive. then i might PM you.
interesting on the 2.7kg bike it is stated the saddle/post combo was >80g, any ideas how it could get so light? looks like a tune speedneedle and some high spec carbon for post? just ruminating/rambling
thanks again
peace out
3.990 kilo cannondale supersix himod (2016)
viewtopic.php?f=10&t=160600#p1549663

jwalther
Posts: 44
Joined: Mon Nov 24, 2014 12:08 pm

by jwalther

The front rail attachment on my Hlod has separated from the underside of the saddle. Nothing broken or cracked. Superglue, or something else?
2016 Trek Emonda SLR
2019 Felt Breed 30
2013 Co-Motion Supremo when the wife wants to ride


mrlobber
Posts: 1232
Joined: Sat Oct 23, 2010 9:36 am
Location: Where the permanent autumn is

by mrlobber

jwalther wrote:
Thu Jun 04, 2020 12:07 pm
The front rail attachment on my Hlod has separated from the underside of the saddle. Nothing broken or cracked. Superglue, or something else?
Typical for many Berk saddles, unfortunately.
Superglue won't help in the long term.
People have had success with Jbweld epoxies.
Ex-bikes: Cube Aerium C68 SLT 2018 / Cervelo S5 2015 / Felt AR FRD 2014 / Cannondale SS HM 2014 / Scott Addict SL 2014 / Scott Plasma Premium 2014 / Orbea Orca 2008 / Look 596

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kgt
Posts: 8749
Joined: Sun Jun 18, 2006 10:29 am
Location: Athens, Greece

by kgt

One of the main reasons I sold my Lupina... I did not like the fact that rails are just glued on the shell and not glued in lugs like in most other carbon saddles. Yes, it is lighter this way but not great in terms of engineering; the structure of the saddle depends on the strength of the glue (or lack of it).
Try epoxy glue, it will probably work.

beanbiken
Posts: 802
Joined: Tue Mar 18, 2014 10:13 pm
Location: Great Southern Land

by beanbiken

Yes I used the JB Weld to reattach one of the rails, rode a couple of times until the replacement arrived so is now sitting as a back up... I could not fault Jure’s customer service
BB

Coffee & carbon

jwalther
Posts: 44
Joined: Mon Nov 24, 2014 12:08 pm

by jwalther

Thanks guys, I'll try some JB Weld and report back.
2016 Trek Emonda SLR
2019 Felt Breed 30
2013 Co-Motion Supremo when the wife wants to ride

biwa
Posts: 322
Joined: Fri Sep 21, 2018 8:39 pm

by biwa

Thinking to try a Lupina (padded and oval rails), two questions: what is its stack height and does the oval version also suffer the rail detachment issue mentioned above?

Yoln
Posts: 443
Joined: Thu Nov 14, 2019 10:26 pm

by Yoln

This eBay seller currently has 6 Berks shipping from Hong-Kong, given the difficulty to source Berk Saddles with Covid at the moment in the US (I've been waiting 6 weeks already and the saddle is still locked at customs on its way to the store), I am tempted to order from this guy:

https://www.ebay.com/sch/m.html?_odkw=& ... k&_sacat=0

Any idea if this is a legit Berk reseller?
Wilier “Cento Ramato“ : viewtopic.php?f=10&t=160943

Lynskey “the Do-it-all Helix” 🧬: viewtopic.php?f=10&t=161550

ome rodriguez
Posts: 720
Joined: Fri Feb 24, 2006 9:16 am

by ome rodriguez

Yes they are legit. I know the owner of that bikeshop in hong kong.
Ax-lightness VIAL evo 3,89kg - sold

Lightweight Urgestalt Disc 6,86kg - sold

Specialized S-Works Tarmac SL6 Ultralight 6,16kg - sold

Specialized S-Works Tarmac SL7 6,93kg

Specialized S-Works Aethos 571g

Yoln
Posts: 443
Joined: Thu Nov 14, 2019 10:26 pm

by Yoln

ome rodriguez wrote:
Tue Jun 16, 2020 9:09 pm
Yes they are legit. I know the owner of that bikeshop in hong kong.
Thanks!
Wilier “Cento Ramato“ : viewtopic.php?f=10&t=160943

Lynskey “the Do-it-all Helix” 🧬: viewtopic.php?f=10&t=161550

Darrenmv
Posts: 4
Joined: Wed Sep 06, 2017 8:35 pm

by Darrenmv

Don’t normally post reviews / comments (good or bad) but have had dealings twice with Jure at Berk in the last month, and he has been excellent in sorting out a problem and comfort of my Lupina with the level of responsiveness, understanding, customer service (some of the best I have ever experienced) and willingness to do far more than I could realistically ask or expect that I feel I have to publicly recognise this and make sure he gets the credit.
To me the level of service would be enough to buy products from him

GeoffS
Posts: 94
Joined: Wed Feb 05, 2020 12:52 pm

by GeoffS

I have a Ritchey single-bolt clamp on my seatpost. It indicates a max torque of 12 Nm, but my Berk Lupina has a sticker showing 5 Nm as max torque. I torqued it up last night to 5 Nm but today on a ride the seat moved when going over a bump. Does anyone know if 12 Nm is ok with the Ritchey single-bolt clamps? I've searched and this question has come up before, but no clear answer from Berk themselves.

reedplayer
Posts: 665
Joined: Sat Nov 14, 2015 10:10 am

by reedplayer

biwa wrote:
Wed Jun 10, 2020 8:48 pm
Thinking to try a Lupina (padded and oval rails), two questions: .......does the oval version also suffer the rail detachment issue mentioned above?
in my experience, regrettably, yes. a list and a lupina, both did suffer this issue after short use period, at a rider weight of 62 kg.

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PinaRene
Posts: 783
Joined: Mon Feb 12, 2007 12:08 pm

by PinaRene

GeoffS wrote:
Sun Aug 09, 2020 6:00 am
I have a Ritchey single-bolt clamp on my seatpost. It indicates a max torque of 12 Nm, but my Berk Lupina has a sticker showing 5 Nm as max torque. I torqued it up last night to 5 Nm but today on a ride the seat moved when going over a bump. Does anyone know if 12 Nm is ok with the Ritchey single-bolt clamps? I've searched and this question has come up before, but no clear answer from Berk themselves.

I asked Berk the same question 2 yrs ago when I bought my Lupina. It is safe to go to the spec. torque of the clamp 12Nm. As you can see in my signature my Scott Foil has the same 1 bolt clamp. I have torqued it at 10Nm with some carbon paste. Never had any problems with it.

Send an email to Berk to be sure. He will give you the answer.

GeoffS
Posts: 94
Joined: Wed Feb 05, 2020 12:52 pm

by GeoffS

Thanks Pina.


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